Agent and process for the determination of calcium

Details Agent and process for the determination of calcium Agent and process for the determination of calcium

1986-04-24

1989-10-03

Richman, Barry S.

Chemistry: analytical and immunological testing

Metal or metal containing

Li, na, k, rb, cs, fr, be, mg, ca, sr, ba, ra

436 18, 436 19, 436 74, G01N 3320

Patent

active

048716782

ABSTRACT:
An agent and process are used for the determination of calcium in liquids. The agent contains essentially orthocresolphthalein complexone, an acid and a zwitterionic buffer and is characterized in that the buffer contains at least one sulphonic acid amine of the general formula ##STR1## wherein R.sub.1 and R.sub.2 are identical or different and denote H or alkyl, hydroxyalkyl or cycloalkyl having in each case up to 8 C atoms and

REFERENCES:
patent: 3629142 (1971-12-01), Marbach
patent: 3754865 (1973-08-01), Gindler
patent: 3798000 (1974-03-01), Helger
patent: 3822116 (1974-07-01), Morin
patent: 3938954 (1976-02-01), Stavropoulos et al.
patent: 4363633 (1982-12-01), Christiansen
patent: 4595677 (1986-06-01), Riniker et al.
Elements of Quantitative Analysis, 4th Edition, Hobart et al., p. 174.

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